Stretching and Shrinking c 08

Stretching and Shrinking

Big IdeaMany things in our world are mathematically similar and we can use this to understand and describe the world around us.

EQ1 How can I make a drawn figure larger?
1.1 Stretching a Figure - HSB
MR13 - AM

EQ2 What is the same and what is different about “similar” figures?
2.1 Drawing Wumps - NC
2.2 Nosing Around - MA
2.3 Making Wump Hats - MA
MR27 - MSK

EQ 3 How can I use math to check if two figures are similar?
3.1 Identifying Similar Figures - MK
3.2 Building with Rep-tiles - OC
3.3 Subdividing to find Rep-tiles - ED
MR40 - AB

EQ 4/5 What types situations can I use my similarity ideas to solve?
4.1 Using Similarity to Solve a Mystery - ST
4.2 Scaling Up - SF
4.3 Making Copies - AR
4.4 Using Map Scales - AA
MR58 - GA

EQ 4/5 What types situations can I use my similarity ideas to solve?
5.1 Using Shadows to Find Heights - PM
5.2 Using Mirrors to Find Heights - FA
5.3 Using Similar Triangles to find Distances - HSB
MR74 - MK

EQ6 How can I use turtle math?
6.1 Drawing Similar Figures with a Computer - FA
6.2 Stretching and Shrinking Flags - ST
MR84 - TC





Stretching and Shrinking Vocabulary

1. angle measure
2. compare
3. congruent
4. corresponds, corresponding
5. diameter
6. image
7. parallel
8. perpendicular
9. ratio
10. scale, scale factor
11. similar
12. vertex